I just purchased a 1970 60hp Evinrude with electric shift. I've heard this called "hydroelectric". How does this work? Is there a solenoid that moves the shift forks or is water involved somehow? Any problems with this system?<br /><br />This engine does not have a "tattle tale" to let you know that the water pump is pumping. When I hooked it up to the hose and ran it no water, or exhaust as far as I could tell, came out of the upper exhaust ports. This worries me as I'm used to looking for water to know the pump is pumping. I had the impeller replaced. The dealer said these motors are thermostaticly controlled and that the motor will have to run for a while before I will see water. I have not yet had this boat to the lake. What should I expect as far as seeing water from the upper exhaust ports to know it is pumping water?